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A member asked:
Could missing at least 5 days of synthroid cause heart racing and late periods? i have been on synthroid for 3 yrs and this is the most i have missed.
A doctor has provided 1 answer
Not likely: Missing Synthroid for this short time should not affect your period or heart. If you think you might be pregnant check then check a home pregnancy test. They are cheap, reliable and available at any pharmacy. Consider having your primary care doctor evaluate your heart. Restart your thyroid medication
Answered 1/21/2018
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